Siebring KRUSER KS750 User manual

KS750 / KS750G
Operator’s Manual
Phone: [phone] www.siebringmfg.com Fax: [phone]
11/09/18
KRUSER

TABLE OF CONTENTS:
1. Cover
2. Table of Contents
3. Condition of Sale
4. Features & Accessories
5. General Safety
6. Consumer Product Safety Commission Warning
7. Precautions / Shading
8. Operating Instructions / Cordage Chart
9. Motor Electrical Diagram
10. Operating Instructions (continued)
11. Garden hose adapter
12. How it works
13. Tank & Component Diagram
14. Tank & Components Description
15. Unloader Description
16. Unloader Diagram –Spray Mode
17. Unloader Diagram –By-pass Mode
18. Pump / plumbing –Unloader modes
19. Pump Diagram / Misting Tip Assembly
20. Flow Diagram –Typical Kruser
21. Troubleshooting Index
22. Troubleshooting (continued)
23. Troubleshooting (continued)
24. Troubleshooting (continued)
25. Winterizing / Shipping Instructions
26. Parts Reference
27. Warning & Caution Labels
Included: ELEY Hose Reel Instructions, CAT 2SF Data Sheet, CAT
SF Service Manual & Honda Manual (if applicable).
2

CONDITION OF SALE
SIEBRING MANUFACTURING, INC.
GEORGE, IA 51237
Pursuant to Magnuson-Moss Warranty Federal Trade Commission
ImprovementAct P.L. 93-637, 88 STAT.2183-2193; U.P.C. 2301-2312
(Jan. 4, 1975), the following limited warranty will now replace all prior
warranties issued by Siebring Manufacturing, Inc.
We warrant the equipment manufactured by us to be free from defects in
material and workmanship under normal use and service, our obligation
under this warranty being limited to replacing at our factory any product, or
parts thereof, which shall within one year after delivery thereof to the
original purchaser be returned to us with transportation (UPS Ground)
charges prepaid, and which our examination shall disclose to our
satisfaction to have been thus defective. We neither assume nor
authorize any other person to assume for us any other liability in
connection with such equipment. “Overnight”, “Next Day” or any shipping
method other than UPS Ground will the responsibility of the customer.
This warranty shall not apply to any equipment which shall have been
repaired or altered outside of our factory in any way so as to affect its
stability and reliability, nor which has been subject to misuse, negligence
or accident, nor to any equipment, which shall have been operated
beyond factory rated capacity. We shall not be liable for consequential
damages caused by defective materials, equipment or parts warranted by
their respective manufacturers.
Siebring MFG will not warranty any sprayer manufactured with brass
components that has been used to apply Zerotol or similar products.
Sprayer warranties on units manufactured with stainless steel pumps and
associated components will be honored.
Any implied warranty (including the warranty of merchantability), to the
extent permitted by law, is excluded.
We will not grant any allowance for any repairs or alterations without
written approval of an executive officer, and we reserve the right to make
changes in design, or to make additions to, or improvements in, our
products without imposing any obligations upon the company to install
them on products previously manufactured.
3

1. CAT Pump
2. Pump Oil Fill Cap
3. Liquid filled gauge
4. Oil Level Sight Glass
5. Filter Bowl with Screen
6. Hose Reel Lock
7. Hose Reel Swivel
8. Fluid Pick-upAssembly
9. By-pass / Fluid return
10. Spray Gun with 18” wand
11. Cap
12. 0° Spray Tip
13. 15° Spray Tip
6
10
9
8
7
11
Sprayer Features & Accessories
4
3
2
1
5
4
12 13

GENERAL SAFETY
1. WARNING –Do not pump flammable or explosive fluids such as gasoline, fuel oil,
kerosene, etc. Do not use in explosive atmospheres. The pump should only be used
with liquids compatible with the pump component materials. Failure to follow this
warning can result in personal injury and/or property damage and will void the product
warranty.
2. Do not run the pump faster than maximum recommended speed.
3. Do not attempt to pump at pressures higher than rated, motor damage may result.
4. Maximum liquid temperature through pump is 140°.
5. Make certain that the power source conforms with the requirements of your equipment
(see cord chart on page 8).
6. Do not operate machine with belt guard, shaft guard or similar safety devices
removed.
7. Prior to servicing, disconnect power, stop engine.
8. Relieve system pressure prior to servicing.
9. Drain all liquids from system before servicing.
10. Secure quick couplers on lines and guns before starting the pump. Aloose quick
coupler may cause a hose whip around under pressure causing personal injury and/or
property damage.
11. Check hoses for weak or worn conditions before each use. Make certain that all
connections are tight and secure.
12. Periodically inspect the pump and system components. Perform routine maintenance
as required. See maintenance section in this manual, CAT pump Service Manual and
Honda engine manual as applicable.
13. Electric motors must be adequately grounded.
14. Do not operate a gasoline engine in an enclosed area. Be sure the area is well
ventilated.
15. Gasoline is a highly combustible fuel. The improper use, storage or handling of
gasoline can be dangerous. Never fill or touch a hot engine.
16. Do not handle a pump or motor with wet hands or when standing on a wet or damp
surface.
17. Use only pipe, hose and fittings rated for the maximum P.S.I.G. rating of the pump. If
an unloader is used, use pipe, hose and fittings rated for the pressure at which the
unloader bypass operates.
5

The U.S. Consumer Product Safety Commission has issued a warning to
consumers who use electrically powered pressure washers for cleaning milk tanks,
spray tanks, and other farm equipment.
According to a federal safety alert, consumers can receive a fatal electrical shock
from pressure washers if the power cord connections become wet or an internal
short exists.
Since pressure washers are used to spray water, the power cord, washer and
consumer are often wet, and this can be fatal, especially if the machine is not
properly grounded, the report explained.
Consumers should not use adaptor plugs to connect the three-wire plug to a two-
prong household receptacle without properly grounding the adaptor plug. Power
cord connections should never be allowed to lie in water.
The commission urges these precautions:
- Always plug a three-wire grounded pressure washer into a properly grounded
receptacle. If possible, use a receptacle protected by a ground fault circuit
interrupter (GFCI).
- Check all flexible cords, plugs and sockets before each use. Replace any
damaged items.
- If an extension cord must be used, use the heavy-duty three-wire, properly
grounded type, and keep the power cord connection out of the water and away from
the item being washed.
- Wear eye protection when using sprayers or pressure washers.
- Wear rubber-soled footwear when operating the washer.
- Never cut or splice the power cord or extension cords.
- Do not leave hoses or cords where they can be run over and damaged.
- Never remove the grounding prong from the power cord plug.
- Never operate the washer after it has tripped a ground fault interrupter or circuit
breaker without first having it examined by a competent repair person.
- Never allow children to operate a pressure washer, and keep them away from the
washer when an adult is using it.
- Never spray the cleaner at yourself or others. The pressure can cause the water
and cleaner to blast under the skin.
- Never start the washer until you have checked to make sure all coupler hose
connections are in place and locked.
FOR MORE INFORMATION, CONSUMERS CAN CALL THE CPSC TOLL-FREE
HOTLINE, 800-638-CPSC.
WASHERS DANGEROUS, SAFETY PANEL WARNS
6

KS750 PRECAUTIONS
ALWAYS - RINSE AND FLUSH OUT THE KRUSER AFTER EACH USE.
ALWAYS - DRAIN ANY REMAINING FLUIDS FROM THE SPRAYER TO
PROTECT IT FROM FREEZING.
ALWAYS - READ AND FOLLOW ALL DIRECTIONS OF THE CHEMICAL
MANUFACTURER (CHECK MSDS).
ALWAYS - PUT FRESH, CLEAN WATER IN THE KRUSER AND TEST THE
SPRAYER FOR PROPER OPERATION BEFORE ADDING ANY SPRAYS.
ALWAYS - WEAR PROTECTIVE GEAR WHEN MIXING OR APPLYING ANY
CHEMICALS. THIS INCLUDES MASK, RESPIRATOR, GLOVES,
GOWN, ETC.
ALWAYS - MAINTAIN THE KRUSER IN GOOD REPAIR. THIS
WILL HELP PREVENT LEAKS, ETC. AND ADD TO THE LIFE OF THE
MACHINE.
ALWAYS –WINTERIZE THE PUMP IF COLD WEATHER IS SUSPECT
7
Shading:
Continental Products Company’s “Kool Ray” liquid shading products are
the only brands authorized for use in the Siebring “Mist R’ Drench” and
“Kruser” line of sprayers.
DO NOT USE LATEX PAINT!
Use of unauthorized products can damage the sprayer pump and
components and will void the warranty.
Prior to applying shading, install a 0° tip and a 50 mesh screen (not
included) in the filter bowl assembly.

KRUSER OPERATING INSTRUCTIONS
PRIOR TO START UP
Completely uncrate unit. Inspect for shipping damages that could interfere with unit
operation. Check for crating/shipping materials lodged in pump/motor assembly, belt
drive (if applicable) steering mechanism and wheel & tire area. Check for foreign debris
in sprayer tank.
Read this manual and comply with all of the safety instructions. Familiarize yourself with
the operating instructions and component location prior to using the unit.
If you have a gas engine powered unit, read and familiarize yourself with the Honda
Owner’s Manual.
Read and be familiar with the CAT Pump manual and operating instructions.
If electrically powered unit, ensure adequate power and extension cords are available to
operate the unit (see chart below).
MOTOR
HP 100 FT. 200 FT. 300 FT. 500 FT.
115V 230V 115V 230V 115V 230V 115V 230V
1/4 # 14 # 14 # 10 # 12 # 8 # 10 # 6 # 8
1/3 # 12 # 14 # 10 # 12 # 6 # 10 # 4 # 8
1/2 # 10 # 12 # 8 # 10 # 6 # 8 # 4 # 6
3/4 # 10 # 12 # 6 # 10 # 4 # 8 # 2 # 6
1 # 8 # 10 # 6 # 8 # 4 # 6 # 4
1 ½ # 4 # 10 # 0 # 8 # 6 # 4
2 # 8 # 6 # 4 # 2
3 # 8 # 6 # 4 # 2
5 # 6 # 4 # 2 # 0
Wire Size for 115 & 230 Volt Single Phase Circuits
Distance –Motor to Fuse or Motor to Meter Box
8

BLUE 1
ORANGE 3
RED 8
2 WHITE
4 YELLOW
5 BLACK
TOGGLE SWITCH MOUNTED
TO MOTOR ELEC. BOX COVER
120 VAC
CORD
KS/OD 750 MOTOR WIRING (BALDOR CL3510 1 HP.)
LOW VOLTAGE (120 VAC)
9

- Check drain plug is installed.
- Assemble gun, wand and appropriate nozzle, secure with wrench.
- Attach gun to hose with wrench.
- Release hose reel lock before attempting to un-reel hose.
- Depress spray gun trigger during start-up to allow for “Load Free” run-up.
- Check sight glass on filter bowl during start-up. Air bubbles during operation may
indicate a cracked filter bowl or missing o-ring or gasket.
START UP
1. Put 10 gallons of water into the sprayer tank. DO NOT ADD SPRAY YET!!!
Start power source (electric motor or engine) and pull the gun trigger. The gauge
should show the desired operating pressure.
Release the trigger, gauge should read zero (0) PSI
TESTS
2. Test the sprayer. It should have up to 750 PSI when spraying with the misting wand.
TANK AGITATION
3. The water in the tank should be agitating whenever the pump is on but not spraying.
LEAK INSPECTION
4. Check for any leaks. Find the source of any and all dripping water. Be sure to
confirm that the filter is clean and that the filter bowl is tightly screwed on.
ADD SPRAY
5. Additional water and spray may now be added to the tank. Any products that are
heavy solids may be added to the tank slowly. Additional water should be added to
the tank to keep the powder well diluted. Some sprays may also be harmful to the
pump seals if used at full strength. Check CAT pump manual for compatibility.
CLEAN UP
6. Cleaning herbicide from the Sprayer: Use one quart of household ammonia per 60
gallon of water (1:240 ratio). Stir well!! Start the pump and run the unit until the
ammonia fills the hose and wand. Allow to stand for 24 hours.
RINSING
7. Flush with fresh water. Triple rinse with clear water. Winterize for cold weather.
See instructions for using the garden hose adapter on the following page.
10

CLEAN & FLUSH GARDEN HOSE ADAPTER
1. Remove the tank lid and pull tank sump pick-up from tank.
2. Connect garden hose adapter to the lower, threaded portion
of the tank sump pick-up assembly.
Note: It is recommended to clean and flush the pump and related
components after each use.
1. 1.
2.
3. Attach garden hose to garden hose adapter and flush as
required.
3.
11

12
How it Works
First, when you start the GAS-POWERED ENGINE, or ELECTRIC MOTOR, of
your sprayers, the motor drives a crankshaft inside the water pump that starts
the pistons or plungers.
Fresh water, coming in from your fluid supply tank, through the intake hose,
picking up fluid near the bottom of the sprayer tank to the inlet side of the
pump manifold.
The CAT pump produces flow and sends it to the unloader. Pressure is
created by restricting the flow at the nozzle. At a given flow, the smaller the
restriction nozzle the higher the pressure; the larger the restriction nozzle the
lower the pressure.
The unloader acts like a traffic cop, sending the preset amount of flow
through the hose and towards the spray gun and nozzle, and sending the by-
pass fluid back to the pump manifold or through the recirculation hose and
back into the tank (depending on the ball valve position). See page 13 - 15
to learn about the unloader.
Water is pushed through the high pressure hose, through the spray gun that's
controlled by a trigger. The trigger on the spray gun is actually a valve that
controls the flow through the wand. Squeezing the trigger opens the valve,
releasing the trigger closes the valve. The spray gun has a trigger lock
feature that will lock the trigger closed for safety to prevent accidental
activation of the spray gun.
The pump produces flow. The pressure is created by restricting the flow
through the use of an appropriate sized nozzle or tip.
The sizes and flow rate calculations of the nozzles and tips provided with the
Kruser sprayer line have been predetermined at the factory. Altering the size
and flow rates of the nozzles and tips can hinder sprayer performance. Wear
in a nozzle or tip can cause pressure drop.
Note: Spray angle does not affect nozzle flow rate.
For twenty-five years, Siebring Manufacturing has been listening to and
incorporating customer suggestions and criticisms to develop a dependable
and user friendly product. The paragraphs below briefly describe the
Siebring “Kruser” line of sprayers and how they operate.

25
20
15
10
5
25
20
15
10
5
KRUSER
KRUSER 25 GALLON TANK & COMPONENTS
Cut-a-way view
1
1
2
2
5
4 5
4
3
6 7
8
1. Tank Lid
2. Tank (25 gallon)
3. Pump Mount Base
4. Tank Drain Plug
5. Tank Sump
6. By-pass / return hose
7. Suction Hose
8. Fluid Pick-up Assembly
13

25 GALLON TANK COMPONENTS & DESCRIPTIONS
1. Tank Lid –(5” spin-on lid) vented, allows access to the tank
for filling & mixing and allows air to displace fluid being
pumped out.
2. 25 gallon horizontal tank - 35” overall length, 18” in wide &
17” high to the top of the lid. Gallon markers on side and
end. Recessed areas for straps and bottom sump for
complete fluid pick-up, draining and cleaning.
3. Pump mount base. Provides a rigid platform to mount the
direct drive pump & motor assembly.
4. Tank Drain –Black plastic ¾” NPT, removable, facilitates
complete draining and cleaning.
5. Tank sump. Lowest point in the tank. The fluid pick-up
assembly is custom made to fit the sump.
6. By-pass / Return hose. Hose from the by-pass port of the
unloader. Relieves excess pressure/flow from the unloader
and provides re-circulation to keep the pump cool, mix
chemicals and to help suspend wettable powders.
7. Suction Hose –⅜” hose. Supplies water/chemical to pump.
8. Fluid Pick-up Assembly –Connected to the pump suction line
and located just off the bottom of the sump in the tank. The
fitting is raised off the bottom of the sump slightly.
14
(See page 11 for tank & component diagram)

This type of unloader may be referred to as a “Trapped Pressure” type or
just "Pressure" type. This type of valve opens to bypass when it senses
the pressure build up of the pump output having nowhere to go. The main
characteristic of this most commonly used valve is how it traps the
pressure in the hose when the trigger of the pressure gun is released and
unloading excess pressure between the pump & unloader.
The disadvantage of this type of valve is the spike of pressure felt by the
operator and sprayer/pressure washer components when the trigger is
again squeezed. This creates a "kickback" effect on the gun/wand so be
careful when using ladders or other types of access equipment. The
“kickback” effect is most noticeable when working with pressures above
1000 PSI. The “Kruser” sprayer line is factory set at 750 PSI for customer
comfort and safety.
Pressure Sensitive Regulating Unloader
When your system uses a trigger gun that stops the water flow from the
pressure pump the unloader valve must be employed. Understand that when
the trigger of the gun is released the water flow to the nozzle is interrupted.
The power source and the pressure pump are still running, without some
pressure system safety device the water would have nowhere to go, building
pressure until pump damage occurs.
Enter the Unloader Valve. The most basic function of the unloader is to act as
a "traffic cop" to the water flow in your system as soon as it senses "pressure
build". When the “Pressure Build” condition is met the unloader will then
actuate the piston assembly to divert the water flow toward the bypass port.
When this is occurring the pump is said to be in "bypass mode" and the
unloader valve is said to be "cycling". This scenario ends when the trigger is
squeezed alerting the unloader valve to redirect the flow to the gun and high
pressure nozzle once again.
15

Pressure Sensitive Regulating Unloader
16
Spray Mode
Bypass
To
Gun
Gun trigger is depressed with gun in
use. Pump flow enters from the left
of the diagram (inlet port), passes
through the unloader, out of the
outlet port, to the gun.
CAUTION: A minimum bypass of 5 -
10% of the UNLOADER RATED
FLOW CAPACITY is required for
proper unloader performance.
Additional bypass fluid
may be the excess
pressure - the difference
between the pump output
and the unloader setting.
Inlet Port Outlet Port
Bypass Port
Check
Valve
Piston Assembly
Pump
Flow
5 - 10 %
Min.

Pressure Sensitive Regulating Unloader
Bypass Mode
Bypass
To
Gun
Gun trigger valve is closed, gun is
not in use. Pump flow enters from
the left of the diagram (inlet port),
dead ends against output check
valve, overcomes the spring
pressure holding the piston
assembly and is forced down
through the bypass port.
CAUTION: A minimum bypass of 5 -
10% of the UNLOADER RATED
FLOW CAPACITY is required for
proper unloader performance.
Inlet Port Outlet Port
Bypass Port
Piston Assembly
WARNING: DO NOT
OPERATE THE PUMP
IN BYPASS MODE
LONGER THAN 2
MINUTES.
Pump
Flow
Check
Valve
17

Supply
Pressure
By-pass
KRUSER UNLOADER MODES
Spray Mode:
Gun trigger is activated,
5-10% bypass is normal
By-pass Mode:
Gun trigger is released.
100% bypass.
Up to 750 PSI
0 PSI
18

To Spray Gun
By-pass Return
to Tank
Fluid supply
(suction line)
from tank
Filter bowl, o-ring in place,
no cracks in sight glass
Kruser Direct Drive Pump &Associated Plumbing
Motor
Pump
Manifold
Unloader
Gauge
Protrusion
towards
strainer
Strainer Core Disc Cap
Misting Tip Assembly
19